Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):
May 15, 2014

ACACIA RESEARCH CORPORATION

(Exact name of registrant as specified in its charter)

Delaware

000-26068

95-4405754

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification No.)

500 Newport Center Drive,

Newport Beach, California

92660

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (949)
480-8300

Not applicable

(Former name or former address, if changed
since last report.)

Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction
A.2. below):

£

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Acacia Research Corporation (the “Company”)
held its 2014 annual meeting of stockholders (the “Annual Meeting”) on Thursday, May 15, 2014, at its headquarters
located at 500 Newport Center Drive, 7th Floor, Newport Beach, California. At the Annual Meeting, the Company’s stockholders:
(a) elected Edward W. Frykman and William S. Anderson to serve on the Board as Class II directors for a term of three years expiring
upon the Company’s 2017 annual meeting of stockholders or until their respective successors are duly elected and qualified;
(b) ratified the appointment of Grant Thornton LLP as the Company’s independent registered public accounting firm for the
fiscal year ending December 31, 2014; and (c) approved, on a non-binding, advisory basis, the compensation of the Company’s
named executive officers for the 2013 fiscal year.

As of March 21, 2014, the record date for
the Annual Meeting, the Company had 50,041,123 shares of its common stock outstanding and entitled to vote. At the Annual Meeting,
45,393,349 shares of the Company’s common stock were present in person or represented by proxy and entitled to vote. The
following sets forth detailed information regarding the voting results at the Annual Meeting:

Proposal 1: Election of two Class
II directors to serve on the Board for a term of three years expiring upon the Company’s 2017 annual meeting of stockholders
or until their respective successors are duly elected and qualified.

Class I Director Nominee

Votes For

Votes Withheld

Broker Non-votes

Edward W. Frykman

37,734,881

1,776,875

5,881,593

William S. Anderson

38,559,866

951,890

5,881,593

Proposal 2: Ratification of the appointment
of Grant Thornton LLP as the Company’s independent registered public accounting firm for the fiscal year ending December
31, 2014.

Votes For

Votes Against

Votes Abstaining

Broker Non-Votes

44,009,384

1,208,063

175,902

0

Proposal 3: Approval, on a non-binding,
advisory basis, of the compensation of the Company’s named executive officers.

Votes For

Votes Against

Votes Abstaining

Broker Non-Votes

26,996,948

12,287,616

227,192

5,881,593

2

SIGNATURES

Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.